diff options
| -rw-r--r-- | fs/namei.c | 8 | ||||
| -rw-r--r-- | mm/swapfile.c | 6 |
2 files changed, 13 insertions, 1 deletions
diff --git a/fs/namei.c b/fs/namei.c index bf6d8a738c59..ff866c07f4d2 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4024,7 +4024,9 @@ int vfs_unlink(struct user_namespace *mnt_userns, struct inode *dir, return -EPERM; inode_lock(target); - if (is_local_mountpoint(dentry)) + if (IS_SWAPFILE(target)) + error = -EPERM; + else if (is_local_mountpoint(dentry)) error = -EBUSY; else { error = security_inode_unlink(dir, dentry); @@ -4526,6 +4528,10 @@ int vfs_rename(struct renamedata *rd) else if (target) inode_lock(target); + error = -EPERM; + if (IS_SWAPFILE(source) || (target && IS_SWAPFILE(target))) + goto out; + error = -EBUSY; if (is_local_mountpoint(old_dentry) || is_local_mountpoint(new_dentry)) goto out; diff --git a/mm/swapfile.c b/mm/swapfile.c index 1e07d1c776f2..7527afd95284 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3130,6 +3130,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) struct filename *name; struct file *swap_file = NULL; struct address_space *mapping; + struct dentry *dentry; int prio; int error; union swap_header *swap_header; @@ -3173,6 +3174,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) p->swap_file = swap_file; mapping = swap_file->f_mapping; + dentry = swap_file->f_path.dentry; inode = mapping->host; error = claim_swapfile(p, inode); @@ -3180,6 +3182,10 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) goto bad_swap; inode_lock(inode); + if (d_unlinked(dentry) || cant_mount(dentry)) { + error = -ENOENT; + goto bad_swap_unlock_inode; + } if (IS_SWAPFILE(inode)) { error = -EBUSY; goto bad_swap_unlock_inode; |